~dns Help~

hello again all !!!
now my big problem is dns !:P :p
i go cpanel/whm
and all my ns is
ns1.hoshdar.org
ns2.hoshdar.org
!
and now i ping hoshdar.org it give me IP !!! so work?
but i cant ADD ns1.hoshdar.org and ns2.hoshdar.org
in my domain Panel !!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Please Help Help 500mb resaller i give u